Escaped curly-braces doesn't preserve in development mode

[timofei-iatsenko]

Describe the bug

Escaped placeholders still get processed as placeholder in development mode.

To Reproduce

repro: https://github.com/ninesunsabiu/lingui-brace-bug/blob/main/src/App.tsx

const literalBrace = i18n._(msg`Hey '{name}'!`)

Rendered as Hey !. {name} treated as placeholder and replaced to empty string

Expected behavior
It should print Hey {name}!, placeholder is not processed and kept as-is.

Root Cause
This happend because message get double compiled in Dev mode.

First compilation (compiled in catalog):

Hey '{name}' -> Hey {name}

Second compilation happened for already compiled message from catalog in runtime in i18n:

Hey {name} -> Hey <replaced to value>

[ninesunsabiu]

Any progress updates?